Variety 0.6.2

Variety is a wallpaper changer that can automatically download wallpapers from various sources, like Flikr, Wallhaven, Bing Photo of the Day, Unslash, Desktoppr, NASA's Astronomy Picture of the Day, as well as a live wallpaper of the world sunlight map. It can also automatically fetch wallpapers recommended by other Variety users.

The app was updated recently with a new "safe mode" option, which can be used to avoid NSFW and sketchy images. This feature relies on user ratings, so it's not perfect, at least until more users rate the wallpapers.

The option can be found in the Variety preferences, on the General tab.

Also, the anonymous stats reporting feature, which was added in Variety 0.6.0, is now live (until now it didn't actually report anything). This can be turned off from the Variety options (Preferences > Sync and social > Usage statistics).

OBS Studio 0.15.4

OBS Studio is a free, open source app for video recording and live streaming (for e.g. Twitch.tv).

In Linux, OBS allows recording a window or a monitor, on top of which you can add various overlays such as an image, text, webcam or media source and of course, audio input (microphone) and output (the game, a music player, etc.), with various options.